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Benzamidine was used in the preparation of heparan sulfate-rich proteoglycan from mouse mammary epithelial cells. It has been used to prevent enzymatic degradation during the purification procedure of bovine factor XII (Hageman factor).

ChEBI: Benzamidine is a carboxamidine that is benzene carrying an amidino group. It has a role as a serine protease inhibitor. It is a member of benzenes and a carboxamidine. It is functionally related to a benzoic acid. It is a conjugate base of a benzamidine(1+).

The Journal of Organic Chemistry, 27, p. 1255, 1962 DOI: 10.1021/jo01051a033
Tetrahedron Letters, 31, p. 1969, 1990 DOI: 10.1016/S0040-4039(00)88891-7

Benzamidine is an inhibitor of plasmin and has been used in the radioimmunoassay of glucagon in human plasma. It prevents the destruction of Thyrotropin-releasing hormone (TRH) added to whole blood in vitro before radioimmunoassay of TRH.

It is liberated from its hydrochloride chloride (below) by treatment with 5M NaOH, extracted into diethyl ether, dried (Na2SO4) and sublimed in vacuo.[Beilstein 9 H 280, 9 I 123, 9 II 199, 9 1264, 9 IV 898.]